Disk grinder.



R. L. CARTER.

Patented Oct. 30, 1917.

2 SHEETS-SHEET l.

[NI/ENTOR.

ATTORNEY R. L. CARTER.

DlSK GRINDER.

APPLICATION HLED Aue.2|.191e.

Patented Oct. 30, 1917.

2 SHEETS-SHEET 2.

l), y mam A TTORNE Y UNITED sTATEs PATENT oEEICE.

RAY L. CARTER, F SYBAGUSE, NEW YORK, ASSIGNOR OF ONE-HALF TO LOUIS 0.

' BUCHHOLZ, -OF SYRACUSE, NEW YORK. g

DISK GBINDER.

To all whom it mag/concern:

Be it known thatv :[RAr L. CARTER, a

l citizen of the United States, residing at Syracuse, inthe county of Onondaga and State of NewYork, have invented certain new and useful Improvements in Disk y Grinders, of which the following is a specior other sourceof power. A further object` is to provide a grinder of the class wherein .the revolving disk-support comprises a fan for blowing away the dust which results from the grinding.. And a further object is to provide novel and simple means for tilting the work-table to dilferent angles relatively to the plane of the grinding disk,

tion; showing by full and dotted lines the' blower. l

the same means being employed for imparting vertical movements of the work-table.

attain these objects by the means set forth in the detailed description which follows, and as illustrated in the accompanying drawings, in which- Figure 1 is'a front side elevation of the complete device. Fig. 2 is a right side elevavarious positions of the work-table, and the means for o erating the same.. Fig. 3 is a central vertical cross-section, taken on line 3 3 of Fig. 1;-showing the construction and arrangement of the grinding 'disk and showing thecommon means for tilting, as well as for raising and lowering, the worktable. And Fig. 5 is a sectionalview taken on line 5-5 of Fig. 2. Y

In the drawing, 2 represents a base or standard which supports vthe working `andother parts of the grinder, upon the top of. which is mounted an electric motor 3 which drives the grinding 'disk and fan, `the said motor having a base 4 which dove-tails into 1 the grooved top of the base 2. .4 represents source of electricity.

the armature shaft ofthe motor, and 5 5 represent wires connecting the motor with a 6 represents the grindin or abrading disk,`whch is preferably a circulark sheet of heavy sand-paper for grinding wood, or it Specication o'f Letters Patent.

ig. 4 is al rear side elevation;

"Patented oct. 3o, 191W.`

Application led August 21, 1916. Serial No. 115,936.

maybe emery or other abrasive material forv grinding metal. The disk 6 is securely mounted upon one face of a metal diskf 7 having a central hub 7 the latter bored out to ieceive one end of the armature shaft, and held in place by a set-screw 8. The

periphery of disk 7 is-chamfered at its rear in place by any suitable means, as a bracket v 10 and screws. 10',I by which it is anchored to the base 2. The rear side of the casing 9 has an outwardly projecting 11, which extends from a s ort distance above the center to the bottom of the casing,

for providing a hollow space 11. The space 11 extends below the casing 9 and in the front face of the said' casing is a slot13. 14 represents a dust ard which is disposed over the lower hal of the disk 6, being secured to the casing 9 by screws 14. The top edge of the guard is positioned slightly belowl the center and is spaced slightly from the disk 6. The lower edge of the guard overlaps the slot 13; The object of the guard 14 is to receive the dust resultin from the grinding as it is carried downwar hollow boss v fy by the rotation4 of disk 6. The rear face o the Aso rotary support 7 is' provided with a number v of integral fan leaves 16, preferably spaced radially near the peripheral ed e of the support. During the rotation of the leaves 16 suck the dust into the hollow space between the guard 14 and the disk 6, thence through the slot 13 into the hollow space 11', thence upwardly in the boss 11 to the center of the casing 9 and through f t e a circular opening 17 in the yrear wall'o casing, concentric to an internal hub 12 of the casing,y thence upwardly again and 1S discharged hrough nozzle-18 (see arrows 1n Figs. 1, 2, 3, and 4). A hose or other conductor (not shown) .may be attached to'the nozzle 18 for carrying the dust tof a con-- venient point;

The work or object tobe'ground bythe y disk 6 is placed on top of a table 19'whichv is normally positionedhorizontally so:that its top side is abouton a level with the center of shaft 4, and disk 6, as shown by the fun lines in- Figs. 1, 2,3, and 4. The

table 19 is supported by an arc-shaped bracket 20 which is rigidly connected to one end of the table by a screw 20. The bracket 20 has a slot 21 and a tongue 21, the latter tting and sliding in a groove 22 of a similar stationary arc-shaped guide 22, which is slidable on a square guide 23, by means of a sliding part 23. The lower end ofthe guide 23 is embedded in a boss 23 at the bottom of the base 2. The top of the guide 23 is held steady and truly vertical by a cap 24 and a bracket 24 which is secured to the base 2 by bolts 25. The table 19 is positioned relatively to the disk 6 so that it may be tilted on a circle the center of. which is substantially the point 19 of said table. The bracket I20 has an arcshaped rack 2G on its underside which is engaged and driven by a pinion 27, the latter being mounted upon the shaft 28, and the latter being journaled in a lug 29 of the slide 23. The shaft 28 is manipulated bya hand-wheel 28. The gear 27 is preferably made rigid on the shaft 28 by the pin 27. 30 represents a second rack which is rigid on the lguide 23 and this rack is engaged by a pinion or gear 31, the latter being normally loose on the said shaft, when the shaft and gear 27 are in the position shown in full lines in Fig. 4. The opposite end of the shaft ,28 is provided with a flange 32, .and a spring 33 is interposed between said flange and gear 31 for normally holding said gear in the idle position and against the lug 29. When it is desired to tilt the work-table19 from the horizontal position to any angle, as indicated by the dotted lines in Fig. 2, the operator turnsthe hand-wheel 28 in the proper direction. The pinion 27 which is held in engagement with the rack 26 by spring 33, operates the said rack and the bracket 20, the latter will then slide on the guide 22 and tilt the table. When, however, it is desired to lower the table 19, as to the position shown by dotted lines in Fig. 2, the operator pulls outwardly on the shaft 28, which action disconnects the gear 27 from the rack 26 (see dotted lines Fig.

4), and brings a pin 34 carried by the `other end of said shaft into engagement with the notch 35 in the hub of gear 31. The latter gear will then rotate with the said Ashaft and being in engagement with the racky 30 it carries the table downwardly, as described. 36 represents a number of clamping Screws which are threaded into the guide 22 and are provided with heads 36 which engage the bracket 20, (see Figs. 2 and 5) for holding the table 19 in the diiierent positions relatively to the center 19.

The free end of the bracket 20 is cut away at 37 for indicating and reading graduations 38 on the corresponding end of the guide 22, the said graduations being employed by the operator for setting the table 19 at the desired angle relatively to the disk naines@ 6. 39 represents set screws carried by the slide 23 for securing said part in any desired position on the guide 23.

My disk grinderis extremely simple and compact and can be produced at a relatively small cost. The provision of the blower 7-16 within the casing 9 which partially receives and is arranged concentric to the grinding disk support, is a novel and economical construction and arrangement which enables me to eliminate several extra parts and also an extra drive for the blower, as compared with the older styles of grinders of the class. Furthermore, the provision of the two racks 26 and 30 and the pinions 27 and 31, the latter being operated by a single shaft, is also a novel impro-vement which saves a number of parts as well as considerable time in the operation of the adjustable work-table.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a support, of a grinding wheel carried thereby, a guard covering a portion of the surface of the wheel and having a suction mouth, an ad justaible work-table extending across said wheel and having its inner end arranged at approximately the mouth of the guard, and near the surface of the grinding wheel, the inner end of the table and the mouth of the guard being formed to permit a substantial adjustment of the table in a circle independently of the guard, yet maintaining Sil' the inner end thereof in close proximity to the mouth of the guard, and suction creat. ing means for collecting the dust entering `the guard, and resulting from the grinding,

substantially as described.

2. The'combination with a support, of a, vgrinding wheel 1 carried thereby, a fan, a

, thereof adjacent of the mouth of the guard,

and means for rotating the fan for creating an air current to discharge the dust entering the guard and resulting from the grinding of the work supported on the table.

3. The combination with a support, of a grinding element carried thereby having a broad grinding face, a guard extending across said face, and covering the lower portion thereof and having an inlet mouth terminating in' close proximity to the surface of the grinding element, a work table disposed parallel with the guard and having its inner edge arranged adjacent the mouth lof the guard, means for rotating the grinding element and suction creating means for v covering the lower portion thereof and havcollecting dust resulting from the grinding 'grinding wheel having a broad grinding face, a guard extending'across said face and ing an inlet mouth, a work 4table disposed parallel with the guard having its innerv edge terminating in close proximity to the mouth of the guard, the inner edge of the work table and the upper edge of the guard being fashioned tov permit a swinging movement of the table relative tothe guard, yet maintaining the same in close relation thereto, and means for rotating the grinding wheel.Y f

In testimony whereof I aiix my signature.

RAY L. CARTER. 

